| years | nesting | early_brood | late_brood | out_of_bounds |
|---|---|---|---|---|
| 1957 | 17 | 3 | 2 | 2 |
| 1958 | 12 | 2 | 3 | 0 |
| 1959 | 8 | 6 | 8 | 10 |
| 1960 | 11 | 5 | 2 | 3 |
| 1961 | 12 | 3 | 4 | 9 |
| 1962 | 9 | 2 | 7 | 9 |
| 1963 | 21 | 2 | 2 | 2 |
| 1964 | 9 | 3 | 4 | 0 |
| 1965 | 31 | 15 | 13 | 2 |
| 1966 | 22 | 8 | 14 | 0 |
| 1967 | 26 | 8 | 12 | 3 |
| 1968 | 24 | 5 | 5 | 2 |
| 1969 | 22 | 7 | 12 | 8 |
| 1970 | 19 | 0 | 6 | 15 |
| 1971 | 30 | 3 | 10 | 14 |
| 1972 | 22 | 4 | 11 | 3 |
| 1973 | 11 | 5 | 16 | 5 |
| 1974 | 23 | 8 | 9 | 7 |
| 1975 | 16 | 10 | 12 | 5 |
| 1976 | 9 | 2 | 4 | 2 |
| 1977 | 8 | 4 | 9 | 0 |
| 1978 | 11 | 4 | 8 | 2 |
| 1979 | 14 | 3 | 4 | 4 |
| 1980 | 3 | 3 | 4 | 6 |
| 1981 | 3 | 2 | 3 | 0 |
| 1982 | 3 | 2 | 2 | 0 |
| 1983 | 6 | 3 | 3 | 2 |
| 1984 | 5 | 11 | 5 | 0 |
| 1985 | 3 | 2 | 3 | 1 |
| 1986 | 6 | 1 | 2 | 0 |
| 1987 | 3 | 3 | 2 | 0 |
| 1988 | 5 | 1 | 2 | 2 |
| 1989 | 4 | 1 | 1 | 0 |
| 1990 | 1 | 1 | 2 | 0 |
| 1991 | 1 | 1 | 1 | 0 |
| 1992 | 1 | 2 | 1 | 0 |
| 1993 | 1 | 2 | 0 | 0 |
| 1994 | 3 | 4 | 4 | 0 |
| 1995 | 3 | 2 | 5 | 0 |
| 1996 | 5 | 2 | 3 | 0 |
| 1997 | 4 | 2 | 2 | 0 |
| 1998 | 3 | 4 | 3 | 0 |
| 1999 | 3 | 2 | 3 | 0 |
| 2000 | 5 | 3 | 3 | 0 |
| 2001 | 3 | 2 | 1 | 0 |
| 2002 | 2 | 3 | 2 | 0 |
| 2003 | 0 | 0 | 1 | 0 |
| 2004 | 0 | 0 | 3 | 0 |
| 2005 | 3 | 3 | 5 | 0 |
| 2006 | 1 | 0 | 2 | 0 |
| 2007 | 1 | 0 | 2 | 0 |
| 2008 | 0 | 0 | 3 | 0 |
| 2009 | 0 | 0 | 2 | 0 |
| 2010 | 2 | 2 | 1 | 0 |
| 2011 | 0 | 0 | 3 | 0 |
| 2013 | 3 | 0 | 1 | 0 |
| 2015 | 4 | 0 | 2 | 0 |
| 2017 | 3 | 0 | 0 | 0 |
| 2018 | 0 | 0 | 1 | 0 |
| 2019 | 0 | 0 | 1 | 0 |
| 2022 | 3 | 0 | 2 | 0 |
| 2023 | 3 | 0 | 1 | 0 |
| 2024 | 3 | 0 | 2 | 0 |
1957-2024 Kenai Swan Exploratory Data Summaries
Data Files
all_raw.csv = compiled, raw data (maintains all fields from historic database, plus one added field “gps_ident” for waypoint values) (see Compilation below)
derived.csv = compiled data, condensed to fewer fields, with some modifications for data clean-up and some added, derived fields (see Cleaning and Deriving below)
Record of Data Manipulation
Compilation
- Compiled/standardized 10 data tables: 1957-2015 database file, 2017 nesting, 2018 productivity, 2019 productivity, 2022 nesting, 2022 productivity, 2023 nesting, 2023 productivity, 2024 nesting, and 2024 productivity
- Entered 2017 nesting and 2022 nesting data from raw
- Corrected survey dates for 2022 productivity and 2024 productivity data
- Added pilot, observer, aircraft, start time, and end time to post-2015 data, if missing
Cleaning
- Reordered columns for clarity
- Concatenated two comments fields into one
- Corrected
adultsvalues of 0 that should not have been 0 (comment: “Swans on nest.”, incubating: 1) -> converted to count of 1 - Removed values from
pilotcolumn that were start times rather than names - Converted some NA (blank) values to 0 values
- For spring survey, if adults were counted but nests were NA, made nests a 0 observation, or if nests were counted but adults were NA, made adults 0.
- For fall survey, if adults were counted but cygnets were NA, made cygnets 0, or if cygnets were counted but adults were NA, made adults 0.
- Removed duplicate observations (rows) from 2013 fall productivity (08/29/2013) survey data (same data x 2)
- Note: It appears that the spring survey for 2013 has most - but not all - duplicates as well, if you truncate all lat-lons to the same number of decimal places before matching up. The June duplicates have not yet been filtered out.
Deriving
- Column for survey type: spring nesting (May/June), early brood (July), late brood (August/September), out of bounds (any other month)
- Column to identify duplicates (
repeats= the number of times an exact coordinate pair shows up in a single survey period in a single year) - Several columns of spatially joined (via intersect) landable lake data
Exploratory Summaries
Method Consistency
Number of days spent surveying per survey period:
Census vs. Nest-Only (Spring Survey Only)
Was the spring survey nest-only or census? One indicator could be whether there are exclusively observations recorded that have nests observed.
Years where all adult counts have a nest observation: 2010
Census vs. Return to a Set Location (nest or lake)
Were the surveys censuses or revisits to pre-set locations (e.g. lakes, nests)? One indicator could be whether locations/observations were recorded with no swans/nests.
Spring survey years with “no swan” observations: 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1971, 1972, 1973, 1974, 1975, 1976, 1978, 1979, 1980, 1981, 1982, 1986, 1993, 1997, 1999, 2010, 2015
Fall survey years with “no swan” observations: 1957, 1958, 1959, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1973, 1975, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2009, 2010, 2018, 2022, 2023, 2024
Disparities in Counts
Totals/Summaries for Review
Summary productivity info:
| years | nesting_swans | num_nests | breeding_swans | cygnets | avg_brood_size |
|---|---|---|---|---|---|
| 1957 | 29 | 15 | 19 | 30 | 3.000000 |
| 1958 | 66 | 33 | 26 | 48 | 3.692308 |
| 1959 | 18 | 10 | 55 | 111 | 3.468750 |
| 1960 | 25 | 13 | 2 | 1 | 1.000000 |
| 1961 | 69 | 35 | 38 | 65 | 3.250000 |
| 1962 | 51 | 28 | 89 | 148 | 3.288889 |
| 1963 | 72 | 42 | 36 | 56 | 3.111111 |
| 1964 | 59 | 30 | 33 | 55 | 3.235294 |
| 1965 | 206 | 110 | 103 | 251 | 4.114754 |
| 1966 | 258 | 133 | 113 | 224 | 3.733333 |
| 1967 | 190 | 100 | 61 | 101 | 3.156250 |
| 1968 | 125 | 65 | 12 | 22 | 3.666667 |
| 1969 | 115 | 59 | 72 | 104 | 2.888889 |
| 1970 | 44 | 30 | 38 | 67 | 3.526316 |
| 1971 | 155 | 89 | 48 | 106 | 4.416667 |
| 1972 | 51 | 29 | 50 | 73 | 2.807692 |
| 1973 | 65 | 36 | 77 | 136 | 3.487179 |
| 1974 | 79 | 41 | 28 | 58 | 3.866667 |
| 1975 | 98 | 55 | 54 | 70 | 2.592593 |
| 1976 | 21 | 12 | 6 | 22 | 4.400000 |
| 1977 | 16 | 9 | 50 | 87 | 3.480000 |
| 1978 | 58 | 29 | 46 | 91 | 3.956522 |
| 1979 | 87 | 45 | 32 | 46 | 2.875000 |
| 1980 | 46 | 25 | 42 | 74 | 3.523810 |
| 1981 | 41 | 30 | 26 | 45 | 3.461539 |
| 1982 | 43 | 23 | 40 | 65 | 3.250000 |
| 1983 | 66 | 33 | 42 | 75 | 3.571429 |
| 1984 | 75 | 38 | 79 | 129 | 3.225000 |
| 1985 | 55 | 29 | 22 | 40 | 3.636364 |
| 1986 | 70 | 36 | 32 | 62 | 3.444444 |
| 1987 | 75 | 38 | 32 | 66 | 4.125000 |
| 1988 | 85 | 43 | 46 | 75 | 3.260870 |
| 1989 | 74 | 40 | 41 | 57 | 2.714286 |
| 1990 | 4 | 2 | 50 | 87 | 3.480000 |
| 1991 | 8 | 4 | 52 | 86 | 3.185185 |
| 1992 | 2 | 1 | 60 | 97 | 3.233333 |
| 1993 | 26 | 14 | NA | NA | NA |
| 1994 | 51 | 27 | 58 | 96 | 3.310345 |
| 1995 | 72 | 36 | 55 | 81 | 2.892857 |
| 1996 | 80 | 40 | 53 | 92 | 3.407407 |
| 1997 | 78 | 39 | 64 | 102 | 3.187500 |
| 1998 | 106 | 53 | 72 | 143 | 3.972222 |
| 1999 | 103 | 52 | 64 | 102 | 3.090909 |
| 2000 | 68 | 34 | 72 | 112 | 3.111111 |
| 2001 | 106 | 53 | 51 | 87 | 3.346154 |
| 2002 | 77 | 40 | 36 | 41 | 2.277778 |
| 2003 | NA | NA | 32 | 49 | 3.062500 |
| 2004 | NA | NA | 60 | 96 | 3.096774 |
| 2005 | 111 | 60 | 103 | 172 | 3.307692 |
| 2006 | 2 | 1 | 8 | 18 | 3.600000 |
| 2007 | 2 | 1 | 23 | 35 | 2.916667 |
| 2008 | NA | NA | 102 | 152 | 2.980392 |
| 2009 | NA | NA | 10 | 19 | 3.800000 |
| 2010 | 0 | 0 | 44 | 61 | 2.772727 |
| 2011 | NA | NA | 106 | 174 | 3.222222 |
| 2013 | 174 | 96 | 43 | 55 | 2.500000 |
| 2015 | 99 | 60 | 60 | 106 | 3.533333 |
| 2017 | 82 | 41 | NA | NA | NA |
| 2018 | NA | NA | 40 | 57 | 2.850000 |
| 2019 | NA | NA | 47 | 68 | 2.833333 |
| 2022 | 87 | 45 | 45 | 74 | 3.217391 |
| 2023 | 93 | 46 | 39 | 48 | 2.400000 |
| 2024 | 89 | 45 | 53 | 72 | 2.666667 |
Note that some observations may have >1 cygnet and >2 adults. For these observations, you would only want to count 2 of the adults as breeding adults.
Summary adult swan totals by survey type:
| years | spring | summer | fall |
|---|---|---|---|
| 1957 | 100 | 22 | 19 |
| 1958 | 205 | 72 | 31 |
| 1959 | 138 | 68 | 92 |
| 1960 | 156 | 104 | 4 |
| 1961 | 441 | 42 | 61 |
| 1962 | 1288 | 43 | 143 |
| 1963 | 607 | 50 | 40 |
| 1964 | 119 | 38 | 39 |
| 1965 | 426 | 102 | 111 |
| 1966 | 382 | 76 | 115 |
| 1967 | 228 | 72 | 67 |
| 1968 | 173 | 22 | 16 |
| 1969 | 178 | 52 | 91 |
| 1970 | 233 | NA | 78 |
| 1971 | 805 | 26 | 112 |
| 1972 | 179 | 53 | 102 |
| 1973 | 136 | 42 | 116 |
| 1974 | 243 | 57 | 35 |
| 1975 | 234 | 75 | 150 |
| 1976 | 138 | 8 | 6 |
| 1977 | 28 | 16 | 88 |
| 1978 | 102 | 45 | 46 |
| 1979 | 145 | 63 | 72 |
| 1980 | 60 | 57 | 49 |
| 1981 | 51 | 76 | 47 |
| 1982 | 126 | 55 | 81 |
| 1983 | 121 | 69 | 77 |
| 1984 | 126 | 59 | 118 |
| 1985 | 162 | 74 | 116 |
| 1986 | 122 | 74 | 54 |
| 1987 | 112 | 96 | 40 |
| 1988 | 116 | 16 | 69 |
| 1989 | 170 | 58 | 116 |
| 1990 | 116 | 67 | 107 |
| 1991 | 125 | 70 | 97 |
| 1992 | 150 | 93 | 135 |
| 1993 | 132 | 60 | NA |
| 1994 | 160 | 138 | 154 |
| 1995 | 181 | 102 | 189 |
| 1996 | 158 | 128 | 135 |
| 1997 | 162 | 129 | 116 |
| 1998 | 144 | 124 | 96 |
| 1999 | 205 | 137 | 74 |
| 2000 | 225 | 84 | 244 |
| 2001 | 187 | 99 | 57 |
| 2002 | 142 | 124 | 52 |
| 2003 | NA | NA | 82 |
| 2004 | NA | NA | 272 |
| 2005 | 227 | 147 | 389 |
| 2006 | 2 | NA | 20 |
| 2007 | 2 | NA | 49 |
| 2008 | NA | NA | 250 |
| 2009 | NA | NA | 18 |
| 2010 | 189 | 216 | 54 |
| 2011 | NA | NA | 250 |
| 2013 | 456 | NA | 192 |
| 2015 | 196 | NA | 187 |
| 2017 | 209 | NA | NA |
| 2018 | NA | NA | 114 |
| 2019 | NA | NA | 142 |
| 2022 | 170 | NA | 69 |
| 2023 | 171 | NA | 64 |
| 2024 | 173 | NA | 63 |
Plot spring adults over time:
Plot spring nests over time:
Plot fall adults over time:
Outlier observations
Subset of data with adult counts > 10 in a single observation:
| sample_date | latitude | longitude | adults | juveniles | cygnets | nest_observed | eggs | comments | aircraft | pilot | observer | start_time | stop_time | survey_type | repeats | lake_name | lake_landable | lake_meters | lake_rule | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 59 | 1961-10-17 | 60.46750 | -150.5108 | 11 | 2 | NA | NA | NA | NA | NA | NA | NA | 8:55 | 16:00 | out of bounds | 9 | NA | NA | NA | NA |
| 198 | 1971-04-30 | 60.71315 | -151.1968 | 11 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 280 | 1976-05-05 | 60.53552 | -150.7572 | 11 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 4555 | 2004-08-24 | 60.30633 | -150.5261 | 11 | NA | 0 | NA | NA | NA | NA | NA | NA | 11:45 | 15:40 | late brood | 3 | Harvey Lake | YES | 3607.185 | Open to Aircraft in Wilderness |
| 5347 | 1985-09-06 | 60.75870 | -150.3451 | 11 | NA | 0 | NA | NA | NA | NA | NA | NA | NA | NA | late brood | 1 | NA | NA | NA | NA |
| 31 | 1959-04-17 | 60.46750 | -150.5108 | 12 | 4 | NA | NA | NA | Mouth of Skilak Lk | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
| 33 | 1975-04-18 | 60.46750 | -150.5108 | 12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 4 | NA | NA | NA | NA |
| 143 | 1971-04-26 | 60.68650 | -150.9923 | 12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 213 | 1962-05-02 | 60.38287 | -151.2885 | 12 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 260 | 1971-04-23 | 60.53552 | -150.7572 | 12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 4 | NA | NA | NA | NA |
| 267 | 1962-05-02 | 60.52331 | -151.2270 | 12 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 9234 | 1960-10-07 | 60.89929 | -150.1204 | 12 | 3 | NA | NA | NA | May be tundra swans | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 9241 | 1963-10-11 | 60.40458 | -150.4450 | 12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | Skilak Lake | YES | 86844.942 | Open to Aircraft in Non-Wilderness |
| 54 | 1963-10-11 | 60.46750 | -150.5108 | 13 | NA | NA | NA | NA | Trumpeter and tundra swans | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 2960 | 1961-05-01 | 60.54134 | -150.7497 | 13 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 40 | 1975-04-22 | 60.46750 | -150.5108 | 14 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 4 | NA | NA | NA | NA |
| 53 | 1995-05-30 | 60.46750 | -150.5108 | 14 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 6054 | 1992-05-29 | 60.76881 | -150.7111 | 14 | NA | NA | 0 | NA | NA | Cessna 206 | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 7597 | 1985-09-06 | 60.64335 | -150.6745 | 14 | NA | 0 | NA | NA | NA | NA | NA | NA | NA | NA | late brood | 1 | Meadow Lake | YES | 2757.558 | Closed to Aircraft in Wilderness |
| 2964 | 1963-05-02 | 60.46580 | -150.5229 | 15 | NA | NA | 0 | NA | NA | NA | NA | NA | 9:45 | 14:40 | spring nesting | 1 | NA | NA | NA | NA |
| 2959 | 1974-04-28 | 60.54134 | -150.7497 | 16 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 190 | 1971-05-11 | 60.59756 | -150.8347 | 17 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 3137 | 2005-08-17 | 60.76854 | -150.1334 | 17 | NA | 0 | NA | NA | NA | NA | NA | NA | 10:00 | 15:20 | late brood | 1 | NA | NA | NA | NA |
| 110 | 1971-04-19 | 60.45937 | -150.5437 | 18 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 1000 | 1988-10-07 | 60.76444 | -150.7258 | 18 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 924 | 1960-05-13 | 60.95315 | -150.2713 | 19 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 43 | 1974-04-26 | 60.46750 | -150.5108 | 20 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 55 | 1963-10-11 | 60.46750 | -150.5108 | 20 | NA | 31 | NA | NA | At least 10 family groups, trumpeter and tundra swans | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 2951 | 1979-04-18 | 60.46580 | -150.5229 | 20 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 2961 | 1974-05-01 | 60.54134 | -150.7497 | 20 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 172 | 1974-04-26 | 60.41589 | -150.4837 | 21 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | Skilak Lake | YES | 86844.942 | Open to Aircraft in Non-Wilderness |
| 178 | 1970-04-27 | 60.55239 | -150.4947 | 22 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | Afonasi Lake | YES | 4092.100 | Closed to Aircraft in Non-Wilderness |
| 188 | 1970-04-30 | 60.59756 | -150.8347 | 22 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 219 | 1971-04-26 | 60.92387 | -150.1895 | 22 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 36 | 1971-04-21 | 60.46750 | -150.5108 | 23 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
| 208 | 1971-04-26 | 60.38287 | -151.2885 | 23 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 264 | 1971-04-30 | 60.53876 | -151.2291 | 23 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 3199 | 1988-10-07 | 60.54134 | -150.7497 | 23 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 27 | 1959-04-13 | 60.46750 | -150.5108 | 24 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
| 189 | 1970-04-30 | 60.74503 | -150.8020 | 24 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 34 | 1961-04-20 | 60.46750 | -150.5108 | 27 | 1 | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 9 | NA | NA | NA | NA |
| 28 | 1961-04-13 | 60.46750 | -150.5108 | 28 | 3 | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 9 | NA | NA | NA | NA |
| 212 | 1959-05-01 | 60.44703 | -151.2338 | 28 | NA | NA | 0 | NA | Marsh south of Kenai | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 35 | 1967-04-21 | 60.46750 | -150.5108 | 31 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 3 | NA | NA | NA | NA |
| 41 | 1962-04-23 | 60.46750 | -150.5108 | 32 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 5 | NA | NA | NA | NA |
| 230 | 1961-05-01 | 60.92387 | -150.1895 | 32 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 215 | 1969-04-22 | 60.38474 | -151.3027 | 33 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 217 | 1976-04-24 | 60.38474 | -151.3027 | 33 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 236 | 1963-05-02 | 60.38474 | -151.3027 | 33 | NA | NA | 0 | NA | NA | NA | NA | NA | 9:45 | 14:40 | spring nesting | 1 | NA | NA | NA | NA |
| 7994 | 1995-08-11 | 60.65252 | -150.7219 | 33 | NA | 0 | NA | NA | NA | NA | NA | NA | NA | NA | late brood | 1 | Big Mink Lake | YES | 3850.972 | Closed to Aircraft in Wilderness |
| 220 | 1971-04-30 | 60.92387 | -150.1895 | 34 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 222 | 1961-05-01 | 60.38474 | -151.3027 | 35 | NA | NA | 0 | NA | Of 35 swans potentially 30 were tundra swans | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 4114 | 1962-05-02 | 60.58344 | -150.5374 | 35 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 49 | 1971-05-10 | 60.46750 | -150.5108 | 38 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 3 | NA | NA | NA | NA |
| 209 | 1971-04-30 | 60.38287 | -151.2885 | 38 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 2966 | 1963-05-06 | 60.54134 | -150.7497 | 38 | NA | NA | 0 | NA | NA | NA | NA | NA | 10:46 | 14:30 | spring nesting | 1 | NA | NA | NA | NA |
| 234 | 1962-05-02 | 60.74354 | -151.0226 | 40 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 277 | 1971-05-03 | 60.53876 | -151.2291 | 40 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 2 | NA | NA | NA | NA |
| 279 | 1971-05-05 | 60.53876 | -151.2291 | 40 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 2 | NA | NA | NA | NA |
| 9211 | 1962-05-02 | 60.89929 | -150.1204 | 45 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 176 | 1970-04-27 | 60.59578 | -150.8110 | 50 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 302 | 1982-05-02 | 60.90292 | -150.1797 | 50 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 263 | 1971-04-30 | 60.53552 | -150.7572 | 51 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 4 | NA | NA | NA | NA |
| 144 | 1971-04-26 | 60.75960 | -150.1724 | 60 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | Scenic Lake | YES | 3001.582 | Open to Aircraft in Wilderness |
| 265 | 1976-05-01 | 60.53876 | -151.2291 | 60 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 273 | 1963-05-02 | 60.53552 | -150.7572 | 67 | NA | NA | 0 | NA | NA | NA | NA | NA | 9:45 | 14:40 | spring nesting | 1 | NA | NA | NA | NA |
| 2958 | 1963-04-26 | 60.46580 | -150.5229 | 72 | NA | NA | NA | NA | NA | NA | NA | NA | 8:45 | 11:47 | out of bounds | 1 | NA | NA | NA | NA |
| 45 | 1961-05-01 | 60.46750 | -150.5108 | 74 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 276 | 1971-05-03 | 60.53552 | -150.7572 | 80 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 2 | NA | NA | NA | NA |
| 2955 | 1983-04-23 | 60.54134 | -150.7497 | 80 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 2957 | 1983-04-25 | 60.54134 | -150.7497 | 80 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 278 | 1971-05-05 | 60.53552 | -150.7572 | 84 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 2 | NA | NA | NA | NA |
| 275 | 1975-05-02 | 60.53552 | -150.7572 | 90 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 292 | 1980-10-10 | 60.53552 | -150.7572 | 100 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 38 | 1959-04-22 | 60.46750 | -150.5108 | 109 | 12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
| 281 | 1970-05-07 | 60.53552 | -150.7572 | 115 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 706 | 1962-05-02 | 60.53558 | -150.4635 | 119 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | Watson Lake | YES | 2234.058 | Closed to Aircraft in Non-Wilderness |
| 9208 | 1960-10-06 | 60.90911 | -150.1756 | 120 | 26 | NA | NA | NA | NA | NA | NA | NA | 15:00 | 16:30 | out of bounds | 1 | NA | NA | NA | NA |
| 237 | 1963-05-02 | 60.91772 | -150.1026 | 143 | NA | NA | 0 | NA | NA | NA | NA | NA | 9:45 | 14:40 | spring nesting | 1 | NA | NA | NA | NA |
| 262 | 1970-04-27 | 60.53552 | -150.7572 | 150 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 2 | NA | NA | NA | NA |
| 46 | 1971-05-03 | 60.46750 | -150.5108 | 220 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 3 | NA | NA | NA | NA |
| 2962 | 1962-05-02 | 60.46580 | -150.5229 | 222 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 37 | 1976-04-21 | 60.46750 | -150.5108 | 250 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 1 | NA | NA | NA | NA |
| 235 | 1962-05-02 | 60.91772 | -150.1026 | 260 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 44 | 1971-04-30 | 60.46750 | -150.5108 | 370 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
| 268 | 1962-05-02 | 60.53552 | -150.7572 | 400 | NA | NA | 0 | NA | NA | NA | NA | NA | NA | NA | spring nesting | 1 | NA | NA | NA | NA |
| 42 | 1971-04-26 | 60.46750 | -150.5108 | 420 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | out of bounds | 6 | NA | NA | NA | NA |
Frequency table for adult counts >10 in a single observation:
| Var1 | Freq |
|---|---|
| 11 | 5 |
| 12 | 8 |
| 13 | 2 |
| 14 | 4 |
| 15 | 1 |
| 16 | 1 |
| 17 | 2 |
| 18 | 2 |
| 19 | 1 |
| 20 | 4 |
| 21 | 1 |
| 22 | 3 |
| 23 | 4 |
| 24 | 2 |
| 27 | 1 |
| 28 | 2 |
| 31 | 1 |
| 32 | 2 |
| 33 | 4 |
| 34 | 1 |
| 35 | 2 |
| 38 | 3 |
| 40 | 3 |
| 45 | 1 |
| 50 | 2 |
| 51 | 1 |
| 60 | 2 |
| 67 | 1 |
| 72 | 1 |
| 74 | 1 |
| 80 | 3 |
| 84 | 1 |
| 90 | 1 |
| 100 | 1 |
| 109 | 1 |
| 115 | 1 |
| 119 | 1 |
| 120 | 1 |
| 143 | 1 |
| 150 | 1 |
| 220 | 1 |
| 222 | 1 |
| 250 | 1 |
| 260 | 1 |
| 370 | 1 |
| 400 | 1 |
| 420 | 1 |
Note: many high counts come from observations in out-of-bounds survey timing
Note: several high counts have comments suggesting the observation includes tundra swans
Note: no obvious cut-off threshold to filter out high counts
Duplicate location observations
Number of duplicate coordinates for each survey period:
Meaning the number of observations where the exact coordinate for the observation shows up multiple times within that survey
| years | nesting | early_brood | late_brood | out_of_bounds |
|---|---|---|---|---|
| 1957 | 55 | 2 | 2 | 2 |
| 1958 | 114 | 36 | 8 | NA |
| 1959 | 57 | 27 | 27 | 10 |
| 1960 | 30 | 43 | 0 | 0 |
| 1961 | 91 | 0 | 4 | 25 |
| 1962 | 60 | 4 | 53 | 21 |
| 1963 | 109 | 4 | 4 | 2 |
| 1964 | 34 | 11 | 18 | NA |
| 1965 | 212 | 47 | 43 | 0 |
| 1966 | 187 | 36 | 44 | NA |
| 1967 | 121 | 37 | 19 | 3 |
| 1968 | 88 | 4 | 0 | 0 |
| 1969 | 85 | 18 | 26 | 5 |
| 1970 | 48 | NA | 11 | 12 |
| 1971 | 130 | 2 | 25 | 24 |
| 1972 | 67 | 13 | 15 | 2 |
| 1973 | 44 | 4 | 31 | 0 |
| 1974 | 78 | 19 | 7 | 11 |
| 1975 | 65 | 16 | 13 | 4 |
| 1976 | 22 | 0 | 2 | 0 |
| 1977 | 4 | 0 | 12 | NA |
| 1978 | 27 | 0 | 13 | 2 |
| 1979 | 40 | 6 | 13 | 2 |
| 1980 | 2 | 2 | 2 | 5 |
| 1981 | 0 | 0 | 0 | NA |
| 1982 | 2 | 0 | 0 | NA |
| 1983 | 7 | 6 | 2 | 2 |
| 1984 | 0 | 3 | 16 | NA |
| 1985 | 26 | 3 | 4 | 0 |
| 1986 | 4 | 0 | 4 | NA |
| 1987 | 0 | 0 | 0 | NA |
| 1988 | 7 | 0 | 0 | 0 |
| 1989 | 24 | 0 | 2 | NA |
| 1990 | 0 | 0 | 0 | NA |
| 1991 | 2 | 0 | 0 | NA |
| 1992 | 0 | 2 | 0 | NA |
| 1993 | 2 | 0 | NA | NA |
| 1994 | 0 | 0 | 0 | NA |
| 1995 | 2 | 0 | 2 | NA |
| 1996 | 4 | 6 | 4 | NA |
| 1997 | 14 | 4 | 6 | NA |
| 1998 | 0 | 0 | 0 | NA |
| 1999 | 6 | 2 | 0 | NA |
| 2000 | 7 | 0 | 11 | NA |
| 2001 | 2 | 0 | 0 | NA |
| 2002 | 4 | 6 | 2 | NA |
| 2003 | NA | NA | 4 | NA |
| 2004 | NA | NA | 26 | NA |
| 2005 | 10 | 4 | 11 | NA |
| 2006 | 0 | NA | 0 | NA |
| 2007 | 0 | NA | 2 | NA |
| 2008 | NA | NA | 0 | NA |
| 2009 | NA | NA | 2 | NA |
| 2010 | 14 | 136 | 8 | NA |
| 2011 | NA | NA | 118 | NA |
| 2013 | 0 | NA | 0 | NA |
| 2015 | 0 | NA | 0 | NA |
| 2017 | 0 | NA | NA | NA |
| 2018 | NA | NA | 0 | NA |
| 2019 | NA | NA | 0 | NA |
| 2022 | 0 | NA | 0 | NA |
| 2023 | 0 | NA | 0 | NA |
| 2024 | 0 | NA | 0 | NA |
Some duplicate coordinates may be due to data being entered twice, such as for 2013. Duplicates in older (esp. pre-GPS) data may be due to assigning lakes or broad areas to a single coordinate. Some of these duplicates may be attributed to multiple observations on a single lake OR to repeat visits to locations during a survey period. If coordinates were recorded with different levels of precision (as in number of decimal places), this can prevent duplicates from being identified. More investigation required.
Spatial Coverage Consistency
Overall, fairly consistent throughout history.
Note that the 2018 productivity survey and a few 2022 nesting survey observations did not have saved coordinates, so they are missing from the maps.
Note: only north appears surveyed in 2015 and 2019
Note: low survey coverage and out-of-bounds Homer observation in 2006
Lake Analysis
Annual Occurrence Tables
Note that the “Unnamed” lake lumps together all lakes where landable is TRUE but lake name is blank.
Open to Aircraft; in Non-Wilderness
| lakes | adults | cygnets | nests |
|---|---|---|---|
| Beaver Lake | 1960 1962 1969 1970 1971 1972 1973 1974 1975 1979 1980 1982 1983 1984 1987 1989 1990 1991 1992 1993 1994 1995 2002 2004 2005 2006 2007 2008 2010 2011 2013 2015 2019 2024 | 1970 1973 1974 1975 1979 1984 1989 1990 1991 1992 1993 1994 1995 2002 2006 2007 2008 2010 2011 2024 | 1969 1970 1973 1974 1975 2002 2024 |
| Ice Lake | 1962 1992 1996 2013 2015 | 2013 2015 | |
| Skilak Lake | 1963 1974 1975 2010 2024 | ||
| Snipe Lake | 1957 1958 1960 1961 1962 1963 1975 1983 1984 1990 1992 1997 2000 2003 2013 2015 | 1957 1958 1961 2000 | 1957 1958 1961 2000 2015 |
| Bear Lake | 1961 1970 1982 2000 2001 2008 2009 2013 2015 2022 | 2000 2008 2009 | 1982 2001 2015 2022 |
| Shadura Lake | 1957 1971 1987 2000 2010 | 1957 | |
| Unnamed | 1958 1959 1960 1961 1962 1963 1964 1965 1966 1969 1970 1971 1972 1973 1975 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2004 2005 2008 2010 2011 2013 2015 2022 | 1958 1961 1962 1963 1964 1965 1966 1970 1973 1977 1978 1980 1981 1984 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2001 2004 2008 2010 2013 2015 | 1958 1961 1962 1963 1964 1965 1966 1969 1971 1973 1975 1978 1979 1980 1981 1983 1984 1985 1986 1987 1988 1989 1994 1995 1996 1997 1998 1999 2001 2022 |
| Gull Lake | 1959 1960 1961 1966 1980 1984 1985 1995 1996 2000 2001 | 1959 1966 1980 1984 1996 | 1984 |
| Krein Lake | 1965 1966 1967 1969 1970 1973 1988 1990 2011 | 1965 1966 1967 1969 1970 2011 | 1965 1966 1967 1969 1970 1988 |
| Quill Lake | 1959 1963 1966 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1979 1980 1981 1982 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2003 2004 2005 2007 2010 2015 2022 | 1959 1963 1966 1968 1969 1970 1971 1976 1977 1980 1981 1982 1987 1988 1989 1991 1993 1998 1999 2000 2001 2003 2005 2007 | 1968 1969 1970 1971 1973 1974 1975 1976 1977 1979 1980 1981 1982 1984 1985 1988 1989 1994 1995 1996 1998 1999 2001 2015 2022 |
| Crane Lake | 1965 1984 1991 | ||
| Stormy Lake | 1960 1961 1962 1964 1966 1967 1971 1973 1988 2013 2015 | 1960 1961 1962 1964 1966 1973 | 1960 1961 1964 1966 1967 2015 |
| Lark Lake | 1958 1959 1995 2004 | 2004 | |
| Two Island Lake | 1983 1985 1987 1994 1995 1996 1998 2003 2010 2017 2022 | 1995 1996 1998 2006 2010 2022 | 1985 1987 1996 1998 2017 2022 |
| Flat Lake | 1962 1970 1973 1980 1981 1985 1987 1990 1991 2000 2004 | 1980 1990 | |
| Warbler Lake | 1960 1961 1972 1974 1990 1999 2000 2005 | 1972 | |
| Barbara Lake | 1977 1989 1997 2000 2002 2010 2023 | 2023 | 1997 2002 2023 |
| Mink Creek Lake | 1957 1958 1959 1962 1965 1966 1967 1969 1970 1974 1975 1978 1979 1981 1984 1986 2013 2019 | 1957 1959 1965 1966 1967 1969 1970 1974 1978 1979 1981 1984 1986 2019 | 1957 1958 1965 1969 1974 1978 1979 |
| Doroshin Lake | 1958 1965 1984 1986 1987 1988 2015 2017 2022 | 1965 1984 | 1984 1986 1987 1988 2017 2022 |
| Cow Lake | 1968 1970 1972 1990 2002 2010 2013 2022 | 1968 1970 1990 | |
| West Finger Lake | 1985 2010 2022 2023 | 2023 | 2023 |
| Goose Lake | 1991 2010 2022 2024 | 1991 2022 2024 | 2022 2024 |
| Chick Lake | 2002 2010 | 2002 | |
| Snag Lake | 1979 2010 | ||
| Trapper Joe Lake | 1958 1961 1962 1963 1969 1970 1971 1986 1989 1991 1992 1994 1996 1997 2009 2013 2024 | 1969 1986 1991 1992 1996 1997 2009 | 2013 |
| Campfire Lake | 1957 1959 1960 1961 1962 1963 1965 1967 1973 1975 1979 1980 1982 1983 1984 1985 1987 1990 1991 1992 1994 1995 1996 1997 1998 1999 2001 2002 2005 2013 2015 2022 2024 | 1957 1959 1960 1962 1965 1973 1975 1979 1980 1982 1986 1987 1990 1991 1992 1994 1995 1996 1997 1998 1999 2001 2005 2024 | 1959 1960 1961 1962 1973 1996 1998 1999 2001 2022 2024 |
| Sportfish Lake | 1993 1997 2003 2005 2024 | 2005 | |
| Torpedo Lake | 1997 2004 2005 2010 | 2005 | 2005 |
| Yugok Lake | 1993 | ||
| Gooseneck Lake | 1975 1987 1989 1992 1993 1996 2008 2011 | 1989 1992 2008 2011 | |
| Plover Lake | 1970 1974 1979 1982 1991 | ||
| Akula Lake | 1971 1991 1994 1996 1998 2005 2013 | 2013 | |
| Middle Finger Lake | 1959 1962 1965 1975 1979 1985 2000 | 1965 | 2000 |
| Bottenintnin Lake | 2000 2003 2004 2005 2008 | ||
| Dunlin Lake | 1993 | ||
| Bay Lake | 1971 1997 | 1997 | |
| East Finger Lake | 1960 1965 1979 | 1965 | |
| Decoy Lake | 1959 1979 1984 1985 1986 1987 1997 2005 | 1959 1984 1986 1987 1997 2005 | |
| Pintail Lake | 1990 1992 1996 | 1990 | |
| McLain Lake | 1960 1963 1969 1972 1978 2003 2005 2007 | 1969 1972 1978 2005 2007 | |
| Ermine Lake | 2000 | ||
| Ootka, Lake | 2000 2004 2010 | ||
| Finger Lake | 1989 2010 2017 | ||
| Raven Lake | 1975 2008 | ||
| Hungry Lake | 2008 | ||
| Willow Lake | 1996 | 1996 | |
| Sunrise Lake | 1984 1989 2019 | 1984 | |
| Tern Lake | 1969 1995 | 1969 | |
| Gruskka Lake | 1959 1973 1979 1991 1994 2011 2013 2015 2019 | 1959 1973 1991 1994 2011 2019 | 2015 |
| Coal Creek Lake | 2022 | ||
| Rhode Lake | 2023 |
Open to Aircraft; in Wilderness
| lakes | adults | cygnets | nests |
|---|---|---|---|
| Scenic Lake | 1971 1972 1975 1980 1983 1985 1997 1998 2000 2001 2002 2013 2024 | 1972 1975 2001 | 1983 2001 2002 2013 |
| Nikolai Lake | 1975 1981 2005 | ||
| Taiga Lake | 1985 1987 1989 1998 2001 2002 2005 2010 2015 | 2002 | 1998 2001 2002 2015 |
| Bird Lake | 1994 1997 1998 2010 | 1998 | 1998 |
| Sandpiper Lake | 1995 1998 2002 | 1998 | 1998 |
| Bedlam Lake | 1987 1988 2001 2005 2009 2013 | 2001 2005 2009 | 1988 2001 |
| Point Lake | 1972 2005 2010 | 2005 2010 | 2005 |
| Wilderness Lake | 1957 1958 1959 1960 1961 1962 1963 1964 1987 2013 | 1957 1958 1959 1960 1961 1963 1964 | 1957 1958 1959 1961 1962 1963 1964 |
| Mull Lake | 1988 1989 1990 1997 1999 2003 2007 2008 2010 | 2003 | |
| Cook Lake | 2005 | ||
| Harvey Lake | 1995 2000 2002 2004 2013 | 2000 2002 | 2002 2013 |
| Norak Lake | 1979 1993 1996 2007 | ||
| Vogel Lake | 1961 1970 1974 2002 2005 2007 2015 | 2002 2005 2007 | 2002 2005 |
| Kolomin Lake | 1997 2000 2013 | 1997 2000 | 2013 |
| Fox Lake | 1975 1978 1982 1984 1991 1994 1999 2005 2008 2011 2013 | 1978 1982 1984 1991 2005 | 1999 2013 |
| Tustumena Lake | 1997 2013 | ||
| King Lake | 1961 2004 2005 2007 2015 2017 2019 | 2005 2007 | |
| North Kolomin Lake | 2000 | 2000 | |
| Pothole Lake | 2007 | ||
| Lower Russian Lake | 1979 2006 | 1979 | |
| Snowshoe Lake | 2015 | ||
| Tangerra Lake | 2015 |
Closed to Aircraft; in Non-Wilderness
| lakes | adults | cygnets | nests |
|---|---|---|---|
| Equmen Lake | 1958 1963 1969 1971 1989 2013 2015 2023 | ||
| Nest Lake | 1970 1974 1979 1992 2007 2008 2010 2013 | 2008 | 2013 |
| Afonasi Lake | 1958 1959 1961 1962 1963 1970 1975 2005 2015 2024 | 1959 1975 | |
| Marsh Lake | 1958 2000 | ||
| Kelly Lake | 1961 | ||
| Watson Lake | 1959 1961 1962 1969 1970 1971 1972 1974 1975 1985 1989 1990 2004 2022 | 1969 1985 | |
| Headquarters Lake | 1983 1988 | ||
| Silver Lake | 1957 1960 1962 1963 1965 1968 1989 1993 1994 1995 1998 1999 2003 2005 2013 2015 2017 2022 2023 2024 | 1960 1962 1963 1965 1998 1999 2003 2005 2022 | 1957 1960 1963 1965 1968 1998 1999 2005 2013 2017 2022 2023 2024 |
| Mosquito Lake | 1974 | ||
| Lili Lake | 1975 1990 1994 | ||
| Forest Lake | 2015 2023 | ||
| Mox Lake | 2015 | ||
| Lower Ohmer Lake | 2011 | 2011 |
Closed to Aircraft; in Wilderness
| lakes | adults | cygnets | nests |
|---|---|---|---|
| Martin Lake | 1958 1959 2001 | ||
| Sucker Lake | 1971 | ||
| Moosehorn Lake | 1964 1975 1989 1991 1995 1997 2000 2001 2002 2005 2022 | 1989 2001 2005 | 1989 |
| Fish Lake | 1965 1966 | 1965 | 1965 1966 |
| Swan Lake | 1960 1961 1969 1970 1971 1974 1983 1986 1991 1994 1995 1996 1997 1998 1999 2000 2004 2005 2007 2008 2010 2011 2013 2015 2019 2022 2023 2024 | 1994 1995 2004 2005 2011 2019 2024 | 1995 2005 2024 |
| Angler Lake | 1961 1965 1966 1970 1972 1978 1995 2013 2017 2024 | 1965 1966 1995 | 2017 2024 |
| Unnamed | 1961 1963 1965 1966 1967 1968 1973 1975 1979 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2004 2005 2013 2015 | 1965 1966 1967 1968 1995 1996 1997 2000 2004 2005 | 1965 1983 1984 1985 1986 1999 |
| Kuguyuk Lake | 1958 1960 1963 1965 1966 1968 1970 1972 1979 1982 1983 1985 1990 1991 1992 2000 2001 2004 2005 | 1965 1968 1982 1983 1991 1992 2000 2004 2005 | 1963 1965 1966 1968 1972 1979 1982 1983 2000 2001 2005 |
| Crooked Lake | 1975 1997 | ||
| Spruce Lake | 1958 1962 1963 1996 2008 2010 2011 2013 2023 2024 | 1962 2008 2010 2011 2023 | 2013 2015 2023 2024 |
| Little Mink Lake | 1962 2013 | ||
| Dipper Lake | 1957 1959 1963 1966 1967 1968 1970 1971 1973 1976 1991 1995 1996 1997 1998 2000 2004 2005 2010 2013 2015 2023 2024 | 1957 1959 1963 1966 1967 1968 1970 1971 1991 2023 | 1957 1959 1963 1970 1971 2005 2023 |
| Moose Lake | 1962 1965 1970 1972 1976 1977 1978 1981 1982 1983 1984 1985 1986 1987 1988 1990 1993 1994 1995 1996 1997 2000 2002 2003 2005 2008 2011 2015 2023 | 1965 1981 1983 1984 1985 1986 1987 1988 1993 1995 2000 2008 2011 | 1970 1976 1983 1985 1986 1987 1988 1996 1997 2023 |
| Grebe Lake | 1988 1989 1991 1996 1997 2005 2008 2010 2011 2013 2015 2017 2019 2022 2023 2024 | 1988 1996 2005 2008 2011 2015 2019 2024 | 1988 1997 2005 2015 2017 2023 2024 |
| Canoe Lake | 1957 1958 1961 1962 1964 1971 2011 | 1957 1961 1962 1964 | 1957 1958 1964 |
| Twig Lake | 1970 1976 1977 1979 1980 1982 1983 1984 1985 1986 1987 1988 1989 1991 1992 1993 1994 1995 1996 1997 1998 1999 2005 2010 2023 | 1977 1979 1980 1982 1983 1984 1985 1986 1987 1991 1998 1999 2010 | 1976 1982 1983 1985 1986 1987 1989 1996 1997 1998 |
| Camp Island Lake | 1961 1962 1973 1974 1975 1980 1983 1984 1985 1986 1987 1988 1990 1991 1992 1994 1995 2000 2010 2011 2013 2015 2017 2022 2023 | 1962 1973 1980 1983 1984 1985 1986 1987 1988 1990 1991 1992 2010 2023 | 1980 1983 1984 1985 1986 1987 1988 2017 2022 2023 |
| Rock Lake | 1962 1992 1995 1996 1999 2004 | 1962 | |
| Wren Lake | 2000 2001 2005 | ||
| Loon Lake | 1963 1974 1991 1994 1995 1996 1997 1999 2004 2008 2010 2015 2019 2022 | 1994 1997 2004 | |
| Kenaitze Lake | 1978 1979 1981 1984 1990 1994 | 1978 1984 | 1978 1979 1980 1981 1984 |
| Porcupine Lake | 1977 2001 | 2001 | |
| Beaver Pond Lake | 1975 1999 2000 2001 2004 2005 2013 2015 | 2004 | 2005 |
| Leaf Lake | 1971 1975 2015 | ||
| Aspen Lake | 1986 1987 1989 1998 2001 | 1986 1987 1998 | |
| Diamond Lake | 1961 1965 1966 1973 1984 2005 2013 2015 | 1965 1966 1973 2005 2015 | 1984 2005 2015 |
| Antler Lake | 1973 1992 | ||
| Muskrat Lake | 1983 1994 | ||
| Clam Lake | 1989 1994 1996 1997 1998 2008 2010 2013 2015 2017 2024 | 1989 1996 2008 2010 2013 2015 | 2013 2017 2024 |
| Big Mink Lake | 1994 1995 2002 2005 2010 2023 | 2023 | |
| Rabbit Foot Lake | 1965 1989 1993 1999 2008 2010 2013 2019 | 1965 2010 2013 | 2013 |
| Meadow Lake | 1973 1977 1985 1989 1990 1992 1993 1994 1995 1996 1997 1998 1999 2000 2004 2005 2013 2015 2017 2023 | 1973 1989 1992 1993 1994 1995 1998 1999 | 1998 1999 |
| Wild Lake | 1964 | ||
| Berry Lake | 1985 | ||
| Lynx Lake | 1989 2008 | ||
| Embryo Lake | 1999 | ||
| Gavia Lake | 2005 2015 | 1965 2005 | |
| Drake Lake | 1962 1966 1967 1999 | 1966 1967 1999 | |
| Long Lake | 1965 | ||
| Round Lake | 1971 | 1971 | |
| Weasel Lake | 1993 1994 2005 2013 | ||
| Eider Lake | 1974 2000 | ||
| Falcon Lake | 2000 | ||
| Kraenberi Lake | 1974 1975 1997 | 1974 1975 1997 | |
| Ilerum Lake | 1959 1975 1984 | 1959 1984 | |
| Otter Lake | 1995 2000 | ||
| Olsjold Lake | 2005 2013 | ||
| Birch Lake | 2005 2011 2013 | ||
| Teal Lake | 1994 | ||
| Trout Lake | 2000 | ||
| Kuviak Lake | 2001 | 2001 | |
| Neckshortka Lake | 1990 | ||
| Lower Tangerra Lake | 2008 2013 | ||
| Yearling Lake | 1992 1997 2005 | ||
| Kakoon Lake | 1975 1985 2000 | ||
| Duck Lake | 1977 | ||
| Campers Lake | 2013 2015 |
All Aircraft Rules to Consider:
[1] NA
[2] "Closed to Aircraft in Non-Wilderness"
[3] "Closed to Aircraft in Wilderness"
[4] "Open to Aircraft in Non-Wilderness"
[5] "Open to Aircraft in Wilderness"
[6] "Closed May 1 to Sept. 10"
[7] "'Ice Open to Aircraft in Wilderness" Spatial Join Considerations
Note: Polygon layer appears slightly left-shifted over Topographic Basemap, but NOT with Imagery Basemap.
“Intersect” with Landable Lakes shapefile does not take into account swans on islands.
May need buffer around lakes (e.g., 300 m), but this is tricky when two lakes are closely adjacent
May want to confirm all lakes of interest are included in polygon layer
In the example below, lakes without the red outline are not in the layer.
